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1/*
2 * Copyright (C) 2012-2013 Avionic Design GmbH
3 * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
4 *
5 * Based on the KMS/FB CMA helpers
6 * Copyright (C) 2012 Analog Device Inc.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#include "drm.h"
14#include "gem.h"
15
16static inline struct tegra_fb *to_tegra_fb(struct drm_framebuffer *fb)
17{
18 return container_of(fb, struct tegra_fb, base);
19}
20
21#ifdef CONFIG_DRM_TEGRA_FBDEV
22static inline struct tegra_fbdev *to_tegra_fbdev(struct drm_fb_helper *helper)
23{
24 return container_of(helper, struct tegra_fbdev, base);
25}
26#endif
27
28struct tegra_bo *tegra_fb_get_plane(struct drm_framebuffer *framebuffer,
29 unsigned int index)
30{
31 struct tegra_fb *fb = to_tegra_fb(framebuffer);
32
33 if (index >= drm_format_num_planes(framebuffer->pixel_format))
34 return NULL;
35
36 return fb->planes[index];
37}
38
39bool tegra_fb_is_bottom_up(struct drm_framebuffer *framebuffer)
40{
41 struct tegra_fb *fb = to_tegra_fb(framebuffer);
42
43 if (fb->planes[0]->flags & TEGRA_BO_BOTTOM_UP)
44 return true;
45
46 return false;
47}
48
49bool tegra_fb_is_tiled(struct drm_framebuffer *framebuffer)
50{
51 struct tegra_fb *fb = to_tegra_fb(framebuffer);
52
53 if (fb->planes[0]->flags & TEGRA_BO_TILED)
54 return true;
55
56 return false;
57}
58
59static void tegra_fb_destroy(struct drm_framebuffer *framebuffer)
60{
61 struct tegra_fb *fb = to_tegra_fb(framebuffer);
62 unsigned int i;
63
64 for (i = 0; i < fb->num_planes; i++) {
65 struct tegra_bo *bo = fb->planes[i];
66
67 if (bo)
68 drm_gem_object_unreference_unlocked(&bo->gem);
69 }
70
71 drm_framebuffer_cleanup(framebuffer);
72 kfree(fb->planes);
73 kfree(fb);
74}
75
76static int tegra_fb_create_handle(struct drm_framebuffer *framebuffer,
77 struct drm_file *file, unsigned int *handle)
78{
79 struct tegra_fb *fb = to_tegra_fb(framebuffer);
80
81 return drm_gem_handle_create(file, &fb->planes[0]->gem, handle);
82}
83
84static struct drm_framebuffer_funcs tegra_fb_funcs = {
85 .destroy = tegra_fb_destroy,
86 .create_handle = tegra_fb_create_handle,
87};
88
89static struct tegra_fb *tegra_fb_alloc(struct drm_device *drm,
90 struct drm_mode_fb_cmd2 *mode_cmd,
91 struct tegra_bo **planes,
92 unsigned int num_planes)
93{
94 struct tegra_fb *fb;
95 unsigned int i;
96 int err;
97
98 fb = kzalloc(sizeof(*fb), GFP_KERNEL);
99 if (!fb)
100 return ERR_PTR(-ENOMEM);
101
102 fb->planes = kzalloc(num_planes * sizeof(*planes), GFP_KERNEL);
103 if (!fb->planes) {
104 kfree(fb);
105 return ERR_PTR(-ENOMEM);
106 }
107
108 fb->num_planes = num_planes;
109
110 drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
111
112 for (i = 0; i < fb->num_planes; i++)
113 fb->planes[i] = planes[i];
114
115 err = drm_framebuffer_init(drm, &fb->base, &tegra_fb_funcs);
116 if (err < 0) {
117 dev_err(drm->dev, "failed to initialize framebuffer: %d\n",
118 err);
119 kfree(fb->planes);
120 kfree(fb);
121 return ERR_PTR(err);
122 }
123
124 return fb;
125}
126
127static struct drm_framebuffer *tegra_fb_create(struct drm_device *drm,
128 struct drm_file *file,
129 struct drm_mode_fb_cmd2 *cmd)
130{
131 unsigned int hsub, vsub, i;
132 struct tegra_bo *planes[4];
133 struct drm_gem_object *gem;
134 struct tegra_fb *fb;
135 int err;
136
137 hsub = drm_format_horz_chroma_subsampling(cmd->pixel_format);
138 vsub = drm_format_vert_chroma_subsampling(cmd->pixel_format);
139
140 for (i = 0; i < drm_format_num_planes(cmd->pixel_format); i++) {
141 unsigned int width = cmd->width / (i ? hsub : 1);
142 unsigned int height = cmd->height / (i ? vsub : 1);
143 unsigned int size, bpp;
144
145 gem = drm_gem_object_lookup(drm, file, cmd->handles[i]);
146 if (!gem) {
147 err = -ENXIO;
148 goto unreference;
149 }
150
151 bpp = drm_format_plane_cpp(cmd->pixel_format, i);
152
153 size = (height - 1) * cmd->pitches[i] +
154 width * bpp + cmd->offsets[i];
155
156 if (gem->size < size) {
157 err = -EINVAL;
158 goto unreference;
159 }
160
161 planes[i] = to_tegra_bo(gem);
162 }
163
164 fb = tegra_fb_alloc(drm, cmd, planes, i);
165 if (IS_ERR(fb)) {
166 err = PTR_ERR(fb);
167 goto unreference;
168 }
169
170 return &fb->base;
171
172unreference:
173 while (i--)
174 drm_gem_object_unreference_unlocked(&planes[i]->gem);
175
176 return ERR_PTR(err);
177}
178
179#ifdef CONFIG_DRM_TEGRA_FBDEV
180static struct fb_ops tegra_fb_ops = {
181 .owner = THIS_MODULE,
182 .fb_fillrect = sys_fillrect,
183 .fb_copyarea = sys_copyarea,
184 .fb_imageblit = sys_imageblit,
185 .fb_check_var = drm_fb_helper_check_var,
186 .fb_set_par = drm_fb_helper_set_par,
187 .fb_blank = drm_fb_helper_blank,
188 .fb_pan_display = drm_fb_helper_pan_display,
189 .fb_setcmap = drm_fb_helper_setcmap,
190};
191
192static int tegra_fbdev_probe(struct drm_fb_helper *helper,
193 struct drm_fb_helper_surface_size *sizes)
194{
195 struct tegra_fbdev *fbdev = to_tegra_fbdev(helper);
196 struct drm_device *drm = helper->dev;
197 struct drm_mode_fb_cmd2 cmd = { 0 };
198 unsigned int bytes_per_pixel;
199 struct drm_framebuffer *fb;
200 unsigned long offset;
201 struct fb_info *info;
202 struct tegra_bo *bo;
203 size_t size;
204 int err;
205
206 bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8);
207
208 cmd.width = sizes->surface_width;
209 cmd.height = sizes->surface_height;
210 cmd.pitches[0] = sizes->surface_width * bytes_per_pixel;
211 cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
212 sizes->surface_depth);
213
214 size = cmd.pitches[0] * cmd.height;
215
216 bo = tegra_bo_create(drm, size, 0);
217 if (IS_ERR(bo))
218 return PTR_ERR(bo);
219
220 info = framebuffer_alloc(0, drm->dev);
221 if (!info) {
222 dev_err(drm->dev, "failed to allocate framebuffer info\n");
223 tegra_bo_free_object(&bo->gem);
224 return -ENOMEM;
225 }
226
227 fbdev->fb = tegra_fb_alloc(drm, &cmd, &bo, 1);
228 if (IS_ERR(fbdev->fb)) {
229 dev_err(drm->dev, "failed to allocate DRM framebuffer\n");
230 err = PTR_ERR(fbdev->fb);
231 goto release;
232 }
233
234 fb = &fbdev->fb->base;
235 helper->fb = fb;
236 helper->fbdev = info;
237
238 info->par = helper;
239 info->flags = FBINFO_FLAG_DEFAULT;
240 info->fbops = &tegra_fb_ops;
241
242 err = fb_alloc_cmap(&info->cmap, 256, 0);
243 if (err < 0) {
244 dev_err(drm->dev, "failed to allocate color map: %d\n", err);
245 goto destroy;
246 }
247
248 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
249 drm_fb_helper_fill_var(info, helper, fb->width, fb->height);
250
251 offset = info->var.xoffset * bytes_per_pixel +
252 info->var.yoffset * fb->pitches[0];
253
254 drm->mode_config.fb_base = (resource_size_t)bo->paddr;
255 info->screen_base = (void __iomem *)bo->vaddr + offset;
256 info->screen_size = size;
257 info->fix.smem_start = (unsigned long)(bo->paddr + offset);
258 info->fix.smem_len = size;
259
260 return 0;
261
262destroy:
263 drm_framebuffer_unregister_private(fb);
264 tegra_fb_destroy(fb);
265release:
266 framebuffer_release(info);
267 return err;
268}
269
270static struct drm_fb_helper_funcs tegra_fb_helper_funcs = {
271 .fb_probe = tegra_fbdev_probe,
272};
273
274static struct tegra_fbdev *tegra_fbdev_create(struct drm_device *drm,
275 unsigned int preferred_bpp,
276 unsigned int num_crtc,
277 unsigned int max_connectors)
278{
279 struct drm_fb_helper *helper;
280 struct tegra_fbdev *fbdev;
281 int err;
282
283 fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
284 if (!fbdev) {
285 dev_err(drm->dev, "failed to allocate DRM fbdev\n");
286 return ERR_PTR(-ENOMEM);
287 }
288
289 fbdev->base.funcs = &tegra_fb_helper_funcs;
290 helper = &fbdev->base;
291
292 err = drm_fb_helper_init(drm, &fbdev->base, num_crtc, max_connectors);
293 if (err < 0) {
294 dev_err(drm->dev, "failed to initialize DRM FB helper\n");
295 goto free;
296 }
297
298 err = drm_fb_helper_single_add_all_connectors(&fbdev->base);
299 if (err < 0) {
300 dev_err(drm->dev, "failed to add connectors\n");
301 goto fini;
302 }
303
304 drm_helper_disable_unused_functions(drm);
305
306 err = drm_fb_helper_initial_config(&fbdev->base, preferred_bpp);
307 if (err < 0) {
308 dev_err(drm->dev, "failed to set initial configuration\n");
309 goto fini;
310 }
311
312 return fbdev;
313
314fini:
315 drm_fb_helper_fini(&fbdev->base);
316free:
317 kfree(fbdev);
318 return ERR_PTR(err);
319}
320
321static void tegra_fbdev_free(struct tegra_fbdev *fbdev)
322{
323 struct fb_info *info = fbdev->base.fbdev;
324
325 if (info) {
326 int err;
327
328 err = unregister_framebuffer(info);
329 if (err < 0)
330 DRM_DEBUG_KMS("failed to unregister framebuffer\n");
331
332 if (info->cmap.len)
333 fb_dealloc_cmap(&info->cmap);
334
335 framebuffer_release(info);
336 }
337
338 if (fbdev->fb) {
339 drm_framebuffer_unregister_private(&fbdev->fb->base);
340 tegra_fb_destroy(&fbdev->fb->base);
341 }
342
343 drm_fb_helper_fini(&fbdev->base);
344 kfree(fbdev);
345}
346
347void tegra_fbdev_restore_mode(struct tegra_fbdev *fbdev)
348{
349 if (fbdev) {
350 drm_modeset_lock_all(fbdev->base.dev);
351 drm_fb_helper_restore_fbdev_mode(&fbdev->base);
352 drm_modeset_unlock_all(fbdev->base.dev);
353 }
354}
355
356static void tegra_fb_output_poll_changed(struct drm_device *drm)
357{
358 struct tegra_drm *tegra = drm->dev_private;
359
360 if (tegra->fbdev)
361 drm_fb_helper_hotplug_event(&tegra->fbdev->base);
362}
363#endif
364
365static const struct drm_mode_config_funcs tegra_drm_mode_funcs = {
366 .fb_create = tegra_fb_create,
367#ifdef CONFIG_DRM_TEGRA_FBDEV
368 .output_poll_changed = tegra_fb_output_poll_changed,
369#endif
370};
371
372int tegra_drm_fb_init(struct drm_device *drm)
373{
374#ifdef CONFIG_DRM_TEGRA_FBDEV
375 struct tegra_drm *tegra = drm->dev_private;
376#endif
377
378 drm->mode_config.min_width = 0;
379 drm->mode_config.min_height = 0;
380
381 drm->mode_config.max_width = 4096;
382 drm->mode_config.max_height = 4096;
383
384 drm->mode_config.funcs = &tegra_drm_mode_funcs;
385
386#ifdef CONFIG_DRM_TEGRA_FBDEV
387 tegra->fbdev = tegra_fbdev_create(drm, 32, drm->mode_config.num_crtc,
388 drm->mode_config.num_connector);
389 if (IS_ERR(tegra->fbdev))
390 return PTR_ERR(tegra->fbdev);
391#endif
392
393 return 0;
394}
395
396void tegra_drm_fb_exit(struct drm_device *drm)
397{
398#ifdef CONFIG_DRM_TEGRA_FBDEV
399 struct tegra_drm *tegra = drm->dev_private;
400
401 tegra_fbdev_free(tegra->fbdev);
402#endif
403}